Bump @springio/asciidoctor-extensions in /docs (#968) #82

Job	Run time
deploy / setup	7s
deploy / Build 3.3.x (JDK 21)	5m 43s
deploy / Build 3.3.x (JDK 25)	5m 28s
deploy / Build 3.3.x (JDK 17)	7m 15s
deploy / Trigger CI for non-default branches	0s
	18m 33s

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